Metal-screw machine



(No1-nodal.) l whew-sheen l1.

' G'. D. BBLCHER.

METAL SCREW MAGHINE.

Patented Sept. l19, 1 882.

(No Medel.) 4 sheets-sheet 2.

G1 D. BELGHER.

METAL SCREW MAGHINE. I No. 264,609. l Petented Sepe. 19, 1882..

N. mais Pnmeumempner. wuhi mmmmm c.

(No Model.) 4 sheets-sheet s..

G.`D.BELCEEE.

METAL soEEw MACHINE. No. 264.609. Patented Sept..19,.1882.

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N. PETERS. mio-Lithognpner. wa-hingmn. D. C.

METAL SCREW MAGEINE.

Patented Sept. 19, 1882.

N. Pneus. Pm'vmhugnph". wnhmgum. n. c

UNITED STATES' IPrvrENT OFFICE.

y GEORGE D. BELGHER, OF CHICOPEE, MASSACHUSETTS.

METAL-SCREW MACHINE.

SPECIFICATION forming part of Letters Patent No .264,609, datedSeptember 19, 1882.

Application filed April 14, 1882. (No model.)

To all whom it may concern Be it known that I, GEORGE D. BELCIER, a'citizen of the United States, residing at Chicopee, in the countyofHampden and State ot' Massachusetts, have'invented new and use'- fulImprovements in Metal-Screw Machines,-

of which the following is a specification.

The nature of my invention consists in the construction and arrangementof a screw-machine, as will be hereinafter more fully set f'orth. r

In the drawings, FigureI is a planview of the upper part ot' mygmachine.Fig. `Il isa plan view in partial section, showingmechanism fullydisclosed by the removal ot' some of' the upper portions of the machine.Fig. III is a sectional elevation on the line 9 9 of Fig. I. Fig. IV isareversed-end elevation in section on line 8 8 of Fig. I. Fig. V is anenlarged longitudinal section ot' a chuck with a portion of theoperating mechanism. Fig. VI

'is a detail view of a portion of the. chuck. Fig.

VII is an enlarged longitudinal elevation of oneV of the tool-holderswith the threading-die therein, and Fig. VIII lis a detail in sectionalelevation on line y y of Fig. II.

A is the frame of the machine, constructed in any suitable way to affordthe required bearings for all of the movable portions of its mechanism.

I is a belt-pulley, by vwhich motion is im-` 4parted to all of themovable parts.

The p'ulley I, provided with the gear m', is mounted on thehorizontalshaft 3 at one end of the machine, and through the 'beveledgears (i and imparts motion through a worm-gear upon the vertical shaftof gear 5 to worin-wheel' J upon shaft E. This worm-gearis indicatedbydotted lines in Figs. I and 1I, and as it is common to so connect feedand other shafts with that of the driving-pulley no further illustrationis thought necessary. The gear m of pulley I engages with the equal andconnected gears S, T, U, and W upon bearings in the trame parallel tothose ot' shaft 3'.' The gears S I U W give the proper rotary motion tothe spinthose through which the rod from which the` screw is formed isfed, and prov-ided with the chuck forholding and releasing the rod atthe proper time, rests longitudinallyin bearings in the frame, and formsthe shaft of gear S.

The spindle N forms the shaft of gear U, and carries upon one end thetool for shaving the burr from the slotted head of the screw. It alsocarries the gear n for operating, through corresponding gear, n', andshaft n", the saw w" for slotting the head of the screw before it issubmitted to the shaving-tool. The gear W, forming the last of the trainof' connected gearing in the same horizontal plane, has the spindle 0for its bearing, and alternately rotates it and revolves free upon it,as herein after described. The gear T, intermediate in the train to thecries S and U, causes the spindies MNto revolve in the same direction.The spindle O moves in the reverse direction to its "contiguous spindle,N. .The saw af" occupies ayposition intermediate to the spindles M N andin the space in prolongation of gear T. The ends of the spindles and thecuttingedge of the saw are approximately in a line in the 4same plane.

The shaft E, driven by gear J upon one of its ends, las beforedescribed, extends longitudinally through the frame in bearings therein,and its position is below the spindles M N O and at or near thetransverse center of the frame. l The shaftE thus centrally located, andin operative connection with gear in upon pulley I, forms the shaft forcarrying allot' the cams, which, with the train of gearing abovedescribed, produce all of the consecutive motions needcd toautomatically make the screw.

The cams upon shaft E are the cams J J- upon gear J, as shown in Figs. Iand II, the cam-wheel Y, as shown inAFigs. 1I and III, arranged upon itsshaft beneath the spindles M N O, and the cam-wheel Q upon the oppositeextremity to the one J. lhese cams opera-tethe following connections:Thecams J J reciprocate rod j, sliding in the frame parallel to spindleO, by acting on alternate sides ot' the cam-block on its end,'to,through the arm s, rigid therewith, causev spindle O to be clutched withgear W. The clutch is formed by the pin u on stem t and pin o ougear W.

IOO

The stem t is fr ee to slide within the spindle arm s when connectedwith the gear. In thus clutching gear W and spindle O the rodjsimultaneously moves sleeve r, by means ot' arm l, to close thejaws ot'chuck O.

The cam Y, by means of the projection rv, swings the end of'spring-lever hinged to the frame, as shown in Fig. III, to cause thecutting-off tool .r to be brought against the screw in the chuck ofspindle M. The cam Y also reciprocates screw D to govern the position ofthe toolholders B G relative to the spindles M N O and saw a".

rlhe screw D is provided with one or more quick'lands or grooves, andhas rigidly attached to it the armsi 7:, as shown in Figs. II and VIII.The arm k forms a cam-block to cause the screw D to be reciprocated bycam Y, and the arm 1T, by being sleeved to follow on the rod t', securedin the frame and parallel to screw D, prevents the screw D from rotatingin being reciprocated. rlhe screw D, moving loosely in its supports inand from the frame, has an axial nut in 'the gear C', held in place bylugs from the frame A, as shown in Fig. II, so that the reciprocation ofthe screw D will canse the gear C a movement in one direction and anequal one in the reverse.

Upon each side of wheel G', and extending transversely across the frame,are waysV V, upon which rest and movethe tool-holders B C.

Attached to the holder C, and arranged to extend between the ways V Vand to come immediately over and engage with gear C', is the rack c, bymeans of which it will be seen the longitudinal reciprocation of screw Dis, through wheel C', converted into a transverse reeiprocation ot'tool-holder C.

Upon the ways V V, upon the opposite side of holder G from wheel C', isthe holder B, held, as shown, by spring d, bearing upon one side, tobear in turn upon the stop a from the ways V V.

As shown in Fig. I, the stop a is received within a slot, b, through thebottom of'theholder, and a similar slot, c', is formed in thecorrespondingopposite edge ofholder C, by which, while the stop aybrings the holder B in the proper position relative to spindle M, theholder C can push the one B away to take its place opposite to the samespindle. The spring` d returns holder B when said holder is released byholder C. Holder C is provided with a combined reciprocating andiutermittingly-revolving die, X, and holder B with a reciprocating tool,lt, for forming the head of the screw. Both die X and tool It havebearings in the holders, and extend across them to have their ends uponone side come opposite to and in the same plane with lthe spindles andcutting-edge ofthe saw,while their ends upon the other side ot' theholders are constructed and arranged to be acted on by suitablereciprocating mechanism. Both toolsare also provided with springs, asshown in Fig.I,to retractthem to the holder when released. The die X hasupon its stem the coil-spring e', bearing between an inner holder G. Theend ot' each tooth upon the v ratchet-wheel toward the pawl is beveled,and the end of pawl z is correspondingly beveled to cause the wheel,when returned to the pawl, to at once become fast with it, the pawlpassing between two teeth instead of riding or chattering for a shortdistance. By means ofthis construction ot'die a single stem, spring, andratchetwheel, in connection with the pawl, constitute all of themechanism needed to permit the die to revolve with the screw when beingcut ol'and makeitt'ast with the holder again, the elongated ratchetpermitting deX to have its needed reciprocations in slotting, shaving,and having the screw removed 'rom the die. The cam-wheel Q operates, bymeans ofcam-blocks q, sliding through the wall ot' the frame, as shownin Figs. I, II, and IV, the levers FG II L, to cause them at the propertime to move the tools in the holders B C. lhe ends of these levers arehung upon the transverse rod P, and are provided with springs to causethem to l'ol' low, through the blocks q, the cams upon wheel Q. Thelevers come in contact .with the enlarged rear ends ofthe tools in theholders.

Without a departure from the principle ot this invention, the rear endof the stem of die X may be provided with a cross-head, which wouldenable one or more of the levers to be dispensed with by providing asurface against which one lever could act when the holder C was indifterent positions. The cam Q also reciprocates the rodfto, through armg and sleeve h, automatically operate the chuck upon spindle M.

To throw the driving-pulley out ofoperative connection with cam-drivinggear J, a stem, 3, provided with adog, 2, moving in a slot in shaft 3',passes through the sleeve ot' gear o', and has arranged upon it acoil-spring, 4, to bear between a shoulder upon the stem 3 and the endof the sleeve, by means of which the dog can be pushed to disengagewheel 6 from shaft 3 and render wheel o' inoperative.

The chucks shown in this machine are, as seen in enlarged views, Figs. Vand VI, ot' peculiar construction, in having the wedges 1r w entirelydetached from the rest of the chuck, in place of being hinged at theirrear ends, as is common, by which form they have their fulcrums movableand 'adjustable by the position given the screw-sleeve w. lhus by themovement of sleeve w engaging the projecting ends ofthe wedges above thesurface ot the chuck in the groove ot' its inner surface, saidprojections can be held to canse said wedges to bear upon their extremerear corners to produce an increase of leverage to be overcome by thesliding sleeve r for bearing them against the jaws of the, chuck, andthrough the curved lOO IIO

bearing-surface ot` the.` wedges the sleeve to can be advanced to throwthe fulcrums ot1 said .wedges to a point much farther forward.

The automatic operation of the mechanism herein described in makingscrews is as follows: Therod from which the screw is formed anddetached, being fed through spindleM by the feed device common toscrew-machines, is reduced to leave the head bythe'tool R in ro holderB, through the action ot' lever F, pro

duced by cam Q through block q. At the time this is accomplished and thetool B. retracted by its spring upon its release by lever F-the holder(l is moved to come in contact with holder B to push it away and takeits place with its dieX opposite tothe end of the blank in spindle M,and in a prolongation of its axis, this position being determined by thestop a. When die X is thus .in the proper positiouhit zo is moved bylever F to cut the thread upon the blank. A The tool .fr is swung byprojection x on cam Y to cut the screw olf. During the interval of timebetween the cutting of the thread and the cutting oif of the screw, thedie X is revolving` with the screw, and continues to revolve until thecutting off of the screw releases it to ly back with thetscrew to bringthe ratchet yunder the pawl a. The holder O, With the screw in the dieX, is then moved to aposition opposite sawa, and the die is pushedforward by lever G to have the t slot in the head of the screw cut, theholder being held in exact place by the spring-datent 'e falling intothe depression m. The detent c and depression m are sufficient to steadythe holder and bring it into exact position without opposing anobstacle. to the movement of the holder by its driving-wheel. Theholderl C isVr next moved to have the screw-head shaved by tool inspindle N, and is vthen finally moved oppositeto spindle O to have'dieX, with the completed screw, advanced'to insert the head of the screw inthe open jaws ot' the chuckin spindle O. Thejaws ot' the chuck are atonce closed and the spindle O put into motion to unscrew the screw fromthe die, after which thejaws are opened to drop the screw, the revolvingmovement of the spindle heilig simultaneously stopped by the movement ofrodj by cam J.V As theholderC moves from opposite to spindle M theholder B, propelled by its spring, takespits place simultaneously withthe releaseby rod-f of the chuck ot' spindle M to permit the feed 'ol'another length of rod to' be operated upon by the screw-forming tools.Thus while holder Cv is completing and depositing the screw, holder B iscommencing another, and direct movement is only impartcd to oneioolholder to cause the screw-to be 6obegun,iinished,anddepositedduringonetransfthe holder C in one direction,and the reverse, lasno clutch or shippingdcvice for operating beltsuponpulleys could possibly do.

The machine thus constructed and with its parts so arranged andoperating forms' a complete automatic screw-inachine,in vcompact*`operatively connected with pulley I to advance said-tool R against theblank in the chuck, substantially as shown and described.

2. The combination of spindle-M, holder B, ways V V, spring d, stop a,holder C, and the mechanism adapted to move said holder -upon the waysto cause it to displace holder B; and be held withits die X inprolongation ot' -the blank in spindle M, as shown and described.

3. The combination, in a screw-m achine,with holder C and screw-bearingdie X, and mechanism, substantially as shown, for reciprocating the diein the holder and preventing it from revolving meanwhile, ofthe chuckspindle 0, reciprocating rod j, having shipping-arms s l, connectedrespectively to rod t, sleeved within the spindle, and Vtochuck-operating sleever upon it, and the gear W, arranged upon spindle0, and adapted to be by the movement of rod j clutched to the spindle Osimultaneously with the closingof the jaws ot' the chuck, and releasedfrom the spindle npon the opening of said chuck-jaws, all arranged tooperate i'or the purpose set forth.

. 4. In a`sctewmachinc, the combination,with the cutting-od' tool x, sawn", and spindles Ml N O, all arranged as shown, of holders B and '0,recessed respectively at b c', stop a, spring d, tools R x, andmechanism, as shown and described, for moving holder l upon the ways .VV and reciprocating the tools B w in the holders.

' 5. Ina screw-machine, the colnbination,with the horizontally-arrangedspindles M N 0, and gearing MHS, T, U, and W, and with camshaft E in"operative connection therewith through intermediate gearing, andarranged centrally in frame A below said spindles, of cams J', J, and Q,arranged upon the shaft E, and shipper-rodsjf, arranged wit-hin theframe upon each side ofthe spindles.

6. The combination, with shai't E, arranged and operated as shown anddescribed, and with cam Q thereon, and with holders B O and their tools1t a2, of levers F Gr L, bearing P, and blocks q, for the purpose asshown and described. I

7. Lhe combination,inascrew-machine,with quick screw D, supported in theframe A, and splined toy move thereinwithont turning and IOO IIO.

reciproca-ted by suit-able mechanism, of the 4 nut-gear G', held bymeans from the frame and with sleeve i' and sleeve 10'; having ufrolnsliding on screw D, und tool-holder C,pro groove upon its innersurface, of the detached vided with rack c, as :1nd for the purpose setWedges w 10, adapted to bear, as shown` upon l'orth. the jaws throughsleeve r, and he adjusted, 15

S. Inn screw-machine,theco1nhination,\\ith through the movement ofsleeve w', against die X and holder C, of the elongated corrutheirprojecting corners7 as seb forth.

gated wheely, coil-spring z', arranged upon GEORGE Il BELCHE L the steinot die und paw] c, arranged upon the holder in prolongation ofthecorrngnlions Witnesses:

WM. II. CHArIN.

| xo upon wheel y', :1s und for he purpose Sety forth. i l. S. HYDE, l

il. The. comhinutiolnwith thejuws ol'n chuck l

